<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                    <div class="title border-topbottom">热门城市</div>
                    <div class="button-list">
                        <div class="button-wrapper"  v-for="item of hotCities"
                        :key="item.id"
                        @click="handleCityChange(item.name)"
                        >
                            <div class="button">{{item.name}}</div>
                        </div>
                    </div>
            </div>
            <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityChange(innerItem.name)"
                        >
                            {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  methods: {
    handleCityChange (city) {
      this.$store.dispatch('changeCity', city)
      this.$router.push('/')
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style  lang="stylus"  scoped>
  .border-topbottom
    &:before
     border-color: #ccc
    &:after
     border-color: #ccc
  .border-bottom
    &:before
     border-color: #ccc
  .list
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    overflow: hidden
    .title
     line-height:.54rem
     background:#eee
     padding-left: .2rem
     color:#666
     font-size: .22rem
    .button-list
     overflow: hidden
     padding: .1rem .6rem .1rem .1rem
     .button-wrapper
      float left
      width: 33.33%
      .button
       margin: .1rem
       padding: .1rem 0
       border: .02rem solid #ccc
       text-align:center
       border-radius: .06rem
    .item-list
     .item
      line-height:.76rem
      padding-left: .2rem
</style>
